/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.dubbo.rpc.protocol.tri;

abstract class ServerUnaryInboundTransportObserver extends InboundTransportObserver implements TransportObserver {
    protected static final String DUPLICATED_DATA = "Duplicated data";

    private byte[] data;

    public byte[] getData() {
        return data;
    }

    @Override
    public void onData(byte[] in, boolean endStream) {
        if (data == null) {
            this.data = in;
        } else {
            onError(GrpcStatus.fromCode(GrpcStatus.Code.INTERNAL)
                .withDescription(DUPLICATED_DATA));
        }
    }
}
